Fix memory leaks by clearing view bindings and references in fragments

app/src/main/java/fr/free/nrw/commons/bookmarks/BookmarkListRootFragment.java

@@ -258,6 +258,12 @@ public void onBackStackChanged() {
 
     }
 
+    @Override
+    public void onDestroyView() {
+        super.onDestroyView();
+        binding = null;
+    }
+
     @Override
     public void onDestroy() {
         super.onDestroy();

app/src/main/java/fr/free/nrw/commons/bookmarks/locations/BookmarkLocationsFragment.kt

@@ -143,6 +143,11 @@ class BookmarkLocationsFragment : DaggerFragment() {
         }
     }
 
+    override fun onDestroyView() {
+        super.onDestroyView()
+        binding = null
+    }
+
     override fun onDestroy() {
         super.onDestroy()
         // Make sure to null out the binding to avoid memory leaks

app/src/main/java/fr/free/nrw/commons/bookmarks/pictures/BookmarkPicturesFragment.java

@@ -67,6 +67,12 @@ public void onStop() {
         controller.stop();
     }
 
+    @Override
+    public void onDestroyView() {
+        super.onDestroyView();
+        binding = null;
+    }
+
     @Override
     public void onDestroy() {
         super.onDestroy();

app/src/main/java/fr/free/nrw/commons/contributions/ContributionsFragment.kt

@@ -685,14 +685,23 @@ class ContributionsFragment : CommonsDaggerSupportFragment(), FragmentManager.On
     override fun onDestroy() {
         try {
             compositeDisposable.clear()
+            // Remove child fragment safely
+            contributionsListFragment?.let {
+                childFragmentManager.beginTransaction()
+                    .remove(it)
+                    .commitAllowingStateLoss()
+            }
             childFragmentManager.removeOnBackStackChangedListener(this)
-            locationManager!!.unregisterLocationManager()
-            locationManager!!.removeLocationListener(this)
-            super.onDestroy()
+            locationManager?.unregisterLocationManager()
+            locationManager?.removeLocationListener(this)
+            // Nullify locationManager to prevent leaks
+            locationManager = null
         } catch (exception: IllegalArgumentException) {
             Timber.e(exception)
         } catch (exception: IllegalStateException) {
             Timber.e(exception)
+        } finally {
+            super.onDestroy()
         }
     }
 
@@ -757,7 +766,9 @@ class ContributionsFragment : CommonsDaggerSupportFragment(), FragmentManager.On
 
     override fun onDestroyView() {
         super.onDestroyView()
-        presenter!!.onDetachView()
+        presenter?.onDetachView()
+        binding = null
+        contributionsListFragment = null
     }
 
     override fun notifyDataSetChanged() {

app/src/main/java/fr/free/nrw/commons/contributions/MainActivity.kt

@@ -527,6 +527,11 @@ after opening the app.
         quizChecker!!.cleanup()
         locationManager!!.unregisterLocationManager()
         // Remove ourself from hashmap to prevent memory leaks
+        try {
+            locationManager?.unregisterLocationManager()
+        } catch (e: Exception) {
+            Timber.e(e, "Error while cleaning up locationManager")
+        }
         locationManager = null
         super.onDestroy()
     }

app/src/main/java/fr/free/nrw/commons/media/MediaDetailFragment.kt

@@ -791,7 +791,7 @@ class MediaDetailFragment : CommonsDaggerSupportFragment(), CategoryEditHelper.C
         }
 
         compositeDisposable.clear()
-
+        _binding = null
         super.onDestroyView()
     }
 

app/src/main/java/fr/free/nrw/commons/profile/ProfileActivity.kt

@@ -122,6 +122,10 @@ class ProfileActivity : BaseActivity() {
     public override fun onDestroy() {
         super.onDestroy()
         compositeDisposable.clear()
+        // Nullify fragment references to avoid memory leaks
+        if (::achievementsFragment.isInitialized) achievementsFragment.setHasOptionsMenu(false)
+        if (::leaderboardFragment.isInitialized) leaderboardFragment.setHasOptionsMenu(false)
+        contributionsFragment = null
     }
 
     override fun onCreateOptionsMenu(menu: Menu): Boolean {

app/src/main/java/fr/free/nrw/commons/upload/UploadActivity.kt

@@ -882,6 +882,8 @@ class UploadActivity : BaseActivity(), UploadContract.View, UploadBaseFragment.C
             uploadCategoriesFragment!!.callback = null
         }
         onBackPressedCallback.remove()
+        locationManager?.unregisterLocationManager()
+        UploadMediaPresenter.presenterCallback = null // Clearing reference
     }
 
     /**

app/src/main/res/values/strings.xml

@@ -381,8 +381,8 @@
   <string name="statistics_thanks">Thanks Received</string>
   <string name="statistics_featured">Featured Images</string>
   <string name="statistics_wikidata_edits">Images via \"Nearby Places\"</string>
-  <string name="level">Level %d</string>
-  <string name="profileLevel">%s (Level %s)</string>
+  <string name="level" formatted="false">Level %d</string>
+  <string name="profileLevel" formatted="false">%s (Level %s)</string>
   <string name="images_uploaded">Images Uploaded</string>
   <string name="image_reverts">Images Not Reverted</string>
   <string name="images_used_by_wiki">Images Used</string>